Which of the following are exponential functions? Select ALL that apply. $f(x) = 3^{-x}$ $f(x) = 1^{3x}$ $f(x) = \left(\frac{4}{5}\right)^x$ $f(x) = 4^x$ $f(x) = x^5$ $f(x) = (-2)^x$
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Step 1: An exponential function is a function of the form $f(x) = ab^x$, where $a$ and $b$ are constants, $a \ne 0$, $b > 0$, and $b \ne 1$. Show more…
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